Portable power source



FIG. 1 is a front elevational view of a portable power source showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left-side elevational view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear top, left perspective view thereof;

FIG. 8 is a front, bottom, left perspective view thereof;

FIG. 9 is a rear elevational view thereof showing the power source ready for use; and,

FIG. 10 is a front, bottom, left perspective view thereof showing the power source ready for use.

The broken lines in FIGS. 6, 8 and 10 depict features of the portable power source that form no part of the claimed design. 

CLAIM The ornamental design for a portable power source, as shown and described. 